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- iuon a Jotamerd tion 2AJ(S) + 3 Hzsou(cnो ->PIo. (S०५)2)07 ) + 3Hac3) जाणe जयार Joovchcadl प्रावd + AIनSoq) 3ुका ? when li18 mod of Ad ieactd with 1:14 mod of H2So4.The heat of formation at 25°C of liquid acetone, CH,C(0)CH,(1) is -247.5 kJ/mol. Which of the following is the correct heat of formation reaction for CH,C(O)CH,() )?4) Use the information below to find AHran for... 2MNO2(aq) + COe) → Mn,O3(aq) + CO22) Using the following information: MnO2 + CO → MnO + CO2 AH rxn -151 kJ/mol %3D -54 kJ/mol Mn;04 + C0 → 3MNO + CO2 3Mn,O; + C0 → 2Mn;O4 + CO, AH°, Txn AH°rxn -142 kJ/mol %3D
- Deter mine the rote low ex pression for the following reetion and give units for K. 3Hz t Al, (so4dz8.) Based on the reactions: :1.) 211,S + 30 2SOe + 2H,0) AH, =-1035.94 kJ 2SO + O) AH, = +197.78 k.J b.) 2S0 ) c.) 21,S + O 2S, + 2H,O AH, = +110.02 kJ Use Hesses Law to calculate AH for: 2S, + 30e)(18%) Fill the below table with the average energy in J/mol of a system: translations, rotations, and vibrations (In the classical limit). System Translation Atoms Di-atomic molecules ◆ ◆ Rotation → → Vibration → →
- 4. The n-electron system in benzene may be approximated as a particle-on-a-ring with a radius of r, which is also the length of the C-C bonds in the ring. This bond length is approximately 1.39 A. The energy levels for the p-o-a-r are given by: n'h E, ,where n = 0, t1, ±2, 13, . 2m,r? The six r-electrons in benzene fill the (singly degenerate) n 0 level, and the (doubly degenerate) n=t1 level. The first excited state, then corresponds to exciting an electron from n=1 to n=2. a) Using the given bond length, calculate the energy change for the benzene molecule as an electron is excited from n=1 to n=2. b) Calculate the wavelength of light that benzene would need to absorb to undergo that energy change. Compare that with the experimental value of 268 nm. c) In what portion of the electromagnetic spectrum is this wavelength? d) Using the experimental wavelength from part b above, calculate the effective bond length in benzene. e) Is the particle-on-a-ring approximation valid? Give a…58. Which of the following which is/are true about the internal energy, E? (i) E = Efinal - Einitial (ii) E = Efinal + Einitial (iii) E = = Einitial - Efinal Select one: a. none of these b. (i) c. (iii) d. (ii)O ZnS(s) 2 Hl(ag)- Zn21 (5) * H2S(g) ZnS(s) + 4 Hl(aq)- Znl2 (s) * 2 H2S(g) ZnS(s) +2 HI(aq) - Znl2 (s) + H2S(g) O ZnSO4(s) + 2 HI(aq)- Znl2 (s) + H2SO4(g) QUESTION 3 Choose the correct balanced chemical equation for the following: gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (CH4) and liquid water Co(g) H (g)- CH4 (g) + H200) O 2 C0g) 6 H2 (9)-2 CH4 (9) + 2 H20 O Cog) +6 H (g)- CH4 (g) + H20 O Cog) + 3 H2 9) - CH4 (g) + H2 QUESTION 4 Balance the following cheical equation MgO (5)-25O4 (29) MgS04(s) + (ag) The coeffic ent for MgO is The coeficent for H 504 E
- Transition that causes to the characteristic blue color of K, Re,Cl will be A ) σ-σ' B) 7 – n° С) л— т D) 8-8* Answer A D O O O OProve the following identities. (a) [t, p²] = 2ihp (b) [p, ²] = -2ihâ1-A:-Calculate the energy and wave-length of the photon absorbed when a "Hg"Cl molecule (r. 2.23°A) makes the rotational transition J-0-J-1 and J-1->J=2. B:- In what region of the electromagnetic spectrum are these lines found? 2-Suppose that the equilibrium separation in the '11"CI molecules is the same and equal to 1.27°A. Compute for each molecule A:-The constant 13. B:- The energy of the first two excited rotationa levels. C:-The frequencies and wave length corresponding to the transition J-0-J-1 and J-1-J-2.